Playback source data consists of the sound clips from FSD50K [1]} (\(\sim \) 50h and 11h from training and test sets) and LibriSpeech [2]} (\(\sim \) 40h and 11h from training and test sets). We resampled the playback data to 48 kHz, and pre-processsed to trim silence from the beginning and end of each clip. We manually normalized the ound clips so that the clip's db SPL at the speaker is as close as possible to a real-world example for that sound class. The target db SPL values for each sound class have a random variance of \(\pm 5\)  db SPL. We played each sound clip through a speaker assigned at random, and recorded through the microphone arrays at 48 kHz with 32-bit floating point precision.
